New here

Hi- we just rescued Lexie and have had her for a week now. She is a beautful and living dog and as her new owners we want to know about her breeds and any dog tips...lol.
We know she is about 4-5 years old, rescued from a very bad situation and was never socialized or around other dogs. We know she is German Shepard but unsure of what else. If anyone has any ideas or tips please, let us know!
I will get more pictures of her on here soon!!